Magnetic shipbuilding device



Y 1,481,906 A. J. JACKSON MAGNETIC SHIPBUILDING DEVICE Filed April 14,1925 Patented Jan. 29, 1924:

ARGHIBALID JOHN Jackson, or ron'r OGDEN, FLORIDA.

' MAGNETIC SHIPBUILDING DEVICE.

. Application filed April 14, 1923. Serial No. 632,168.

To all whom it may concern:

Be it known that I, ARCHIBALD JOHN JAcKsoN, a subject of the King ofGreat Britain, residin at Fort Ogden, in the county of De oto and Stateof Florida, have invented certain new and useful Improvements inMagnetic Shipbuilding De. vices, of which the following is aspecification.

Thisinvention relates generally to ship construction, having particularreference to the securing of the hull lates on the ribs or framework,the invention having for an object the provision of magnetic means forus: in holding the plates in position on the ri s.

For further comprehension of the invention, and of the objects andadvantages thereof, reference will be had to the following descriptionand accompanying drawing,

and to the appended claims in which the various novel features of theinvention are more particularly set forth.

Fig. 1 of the drawing is a fragmentary side view of the hull of a ship,indicating the means whereby the plates are held on the frame accordingto my invention.

Fig. 2 is a side view of the magnetic plate holding device showing itengaged with one of the ribs of the ship.

Fig. 3 is a plan view thereof, showing the rib in horizontal section.

Fig. 4 is a side view of the hull of a ship with parts broken away toshow the ribs.

In the drawing I have indicated generally by the reference numeral 10the steel plates of the hull of a ship, while 11 indicates the ribs ofthe ship. to which such plates are secured. I preferably make use ofmagnetic.

means in conjunction with the usual rivets for holding the plates to theribs. This might be done by magnetizing the parts so that they wouldhold together without shakin or vibration.

preferably utilize however, the novel device illustrated in detail inFigs. 2 and 3 and which comprises an elongated rectangular plate 14 ofinsulating material .which serves as a base for the device. Mounted onthe forward side of this plate are several electro-magnets 15, as hereshown four, arranged in pairs, one pair near each end of the plate,while the respective magnets of each pair are laterally spaced from oneanother to straddle the web of the T- shap'ed' rib 11. The device isadapted .to be firmly clamped to the rib with the magnets 15 pressedagainst thecross element of the latter by pairs of gripper jaws in "thegeneral form of bell crankleverseach having a'short arm 18 which formsthe jaw proper,

and a long arm 19 which formsthe handle.

These jaws are pivoted to the free ends of links 20 pivoted at theirother ends to the base as at 21, and the respective jaws of each pairare dis sed on opposite sides of the web of the rib 11, the jaw arms 18projecting toward one another from the links 20 and having sharpenedends which are adapted to bite the sides of said web.

To operate the jaws I provide a pair of solenoids 25 which are fixed onenear each end of the base 14 and to the rear face thereof, with theiraxes transverse to the base. Pivotally connected to the outer ends ofthe plungers 26 of these solenoids are pairs of rigid links 27 which areattached at' one end to the said plungers, and at their opposite ends tothe operating arms or handles 19 of the jaws. Surrounding the plunger 26of each solenoid is a coiled expansion spring 28 which urges the plungeroutwardly, or in a direction to release the jaws. The base 14 may have asuspension eye 30 fixed to one,

end thereof, whereby it may be attached to a chain or the like. Formedin the base toward opposite sides thereof, are the longitudinallyextending slots 31 which permit of access to the heads of the rivets,indicated- I claim as new and desire to protect by Letters Patent of theUnited States is as follows:

1. A plate holding means for the hulls of ships comprising magnets, abase on which said magnets are mounted, and gripper jaws on said baseadapted to grip the ribs of the ship to hold the device in positionthereon.

2. A device of the type described comprising a base, a pair of swinginggripper jaws mounted on said base and adapted to engage opposite sidesof a part to be gripped, links hinged at one end to said base andcarrying the said gripper jaws on their free ends and abutment membersfor the free ends of said links adjustable toward and away from oneanother, for the purpose specified.

3. A device of the type described comprising a base, a pair of gripperjaws, and adapted to engage opposite sides of a partto be gripped, and asolenoid for operating said jaws, links hinged to said base and havingsaid jaws hingedly mounted in turn thereon, and means for adjusting saidlinks to be gripped, and a solenoid for operating a said jaws, linkshinged to said base and having said jaws hinged in turn thereto, andmeans for adjusting said links toward and away from one another, for thepurpose specified, including springs pressing said links againstabutment screws.

In testimony whereof I have affixed my signature.

ARCHIBALD JOHN JACKSON.

